Nice bird shotbut one of the few occasions, in a narrow range of conditions, where the bokeh from this lens is not impressive.I've run into it myself at times, once made for quite a hideous background blur where there were many small tree branches.

find a busy scene at mid distance and look at it thru that lens, then change the FL and aperture and you may find a few situations where the background bokeh is heavily marred by spherical distortions and looks, well, gross.Small tradeoff for the otherwise excellent performance of that lens.I liked the old non-IS version for making smoother background more often but I got the v2 for the ultimate sharpness and contrast.

Would have been even better with the car on left side facing the open frame of the shot. Rigth now that abrupt ending is a bit distracting.

Thanks K-amps.

I was actually going for panning shot with the car on the left side of the frame for most of the event. Unfortunately, I wasn't able to produce a good shot, for a number of reasons. This one came out the best, IMO. Next time I go to a track day, I will definitely give your suggestions a "shot".